Shot by mistake as a traitor in the American Revolutionary War and doomed to remain an earthbound ghost until proved innocent, Costello turns up in 1946 still looking for the evidence. In a similar fix, Marjorie Reynolds floats through the film like a Sears-Roebuck model ghost, but Costello can’t quite make the smoothie grade. It’s good for laughs.

Abbott, who early in the picture plays a 1780 heel, turns up in modern times as a psychiatrist, house-guesting in the mansion Costello and his girl friend are haunting. Latter wreak their revenge via a series of invisible-man stunts that drive the brain specialist out of his mind. This gimmick is worked to the limit, and beyond.